rudiment (n.)
- base
 - basement
 - basic
 - basis
 - bed
 - bedding
 - bedrock
 - blastula
 - bud
 - egg
 - element
 - elements
 - embryo
 - fetus
 - floor
 - flooring
 - footing
 - foundation
 - fundament
 - fundamental
 - fundamentals
 - germ
 - grammar
 - ground
 - grounds
 - groundwork
 - hardpan
 - larva
 - loins
 - nucleus
 - nymph
 - ovum
 - pavement
 - principle
 - principles
 - radical
 - seat
 - seed
 - sill
 - spermatozoon
 - substratum
 - undercarriage
 - understructure
 - zygote